class Employee {
    private int employeeId;
    private String name;
    private double salary;
    private String department;

    public Employee() {
        this.employeeId = 0;
        this.name = "无名氏";
        this.salary = 0;
        this.department = "未定";
    }

    public Employee(int employeeId) {
        this.employeeId = employeeId;
        this.name = "无名氏";
        this.salary = 0;
        this.department = "未定";
    }

    public Employee(int employeeId, String name) {
        this.employeeId = employeeId;
        this.name = name;
        this.salary = 1000;
        this.department = "后勤";
    }

    public Employee(int employeeId, String name, String department, double salary) {
        this.employeeId = employeeId;
        this.name = name;
        this.department = department;
        this.salary = salary;
    }

    public void displayInfo() {
        System.out.println("员工号： " + employeeId);
        System.out.println("姓名： " + name);
        System.out.println("薪水： " + salary);
        System.out.println("部门： " + department);
    }
}

public class Test
{
    public static void main(String[] args) {
        Employee employee = new Employee();
    }
}
